Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Vince Weaver | 1433 | 94.21% | 3 | 16.67% |
Peter Zijlstra | 33 | 2.17% | 3 | 16.67% |
Ingo Molnar | 24 | 1.58% | 3 | 16.67% |
Kan Liang | 9 | 0.59% | 2 | 11.11% |
Thomas Gleixner | 7 | 0.46% | 1 | 5.56% |
Jan Beulich | 7 | 0.46% | 1 | 5.56% |
Kevin Winchester | 3 | 0.20% | 1 | 5.56% |
Christoph Lameter | 2 | 0.13% | 1 | 5.56% |
Borislav Petkov | 1 | 0.07% | 1 | 5.56% |
Greg Kroah-Hartman | 1 | 0.07% | 1 | 5.56% |
Robert Richter | 1 | 0.07% | 1 | 5.56% |
Total | 1521 | 18 |
// SPDX-License-Identifier: GPL-2.0 /* Driver for Intel Xeon Phi "Knights Corner" PMU */ #include <linux/perf_event.h> #include <linux/types.h> #include <asm/hardirq.h> #include "../perf_event.h" static const u64 knc_perfmon_event_map[] = { [PERF_COUNT_HW_CPU_CYCLES] = 0x002a, [PERF_COUNT_HW_INSTRUCTIONS] = 0x0016, [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0028, [PERF_COUNT_HW_CACHE_MISSES] = 0x0029, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x0012, [PERF_COUNT_HW_BRANCH_MISSES] = 0x002b, }; static const u64 __initconst knc_hw_cache_event_ids [PERF_COUNT_HW_CACHE_MAX] [PERF_COUNT_HW_CACHE_OP_MAX] [PERF_COUNT_HW_CACHE_RESULT_MAX] = { [ C(L1D) ] = { [ C(OP_READ) ] = { /* On Xeon Phi event "0" is a valid DATA_READ */ /* (L1 Data Cache Reads) Instruction. */ /* We code this as ARCH_PERFMON_EVENTSEL_INT as this */ /* bit will always be set in x86_pmu_hw_config(). */ [ C(RESULT_ACCESS) ] = ARCH_PERFMON_EVENTSEL_INT, /* DATA_READ */ [ C(RESULT_MISS) ] = 0x0003, /* DATA_READ_MISS */ }, [ C(OP_WRITE) ] = { [ C(RESULT_ACCESS) ] = 0x0001, /* DATA_WRITE */ [ C(RESULT_MISS) ] = 0x0004, /* DATA_WRITE_MISS */ }, [ C(OP_PREFETCH) ] = { [ C(RESULT_ACCESS) ] = 0x0011, /* L1_DATA_PF1 */ [ C(RESULT_MISS) ] = 0x001c, /* L1_DATA_PF1_MISS */ }, }, [ C(L1I ) ] = { [ C(OP_READ) ] = { [ C(RESULT_ACCESS) ] = 0x000c, /* CODE_READ */ [ C(RESULT_MISS) ] = 0x000e, /* CODE_CACHE_MISS */ }, [ C(OP_WRITE) ] = { [ C(RESULT_ACCESS) ] = -1, [ C(RESULT_MISS) ] = -1, }, [ C(OP_PREFETCH) ] = { [ C(RESULT_ACCESS) ] = 0x0, [ C(RESULT_MISS) ] = 0x0, }, }, [ C(LL ) ] = { [ C(OP_READ) ] = { [ C(RESULT_ACCESS) ] = 0, [ C(RESULT_MISS) ] = 0x10cb, /* L2_READ_MISS */ }, [ C(OP_WRITE) ] = { [ C(RESULT_ACCESS) ] = 0x10cc, /* L2_WRITE_HIT */ [ C(RESULT_MISS) ] = 0, }, [ C(OP_PREFETCH) ] = { [ C(RESULT_ACCESS) ] = 0x10fc, /* L2_DATA_PF2 */ [ C(RESULT_MISS) ] = 0x10fe, /* L2_DATA_PF2_MISS */ }, }, [ C(DTLB) ] = { [ C(OP_READ) ] = { [ C(RESULT_ACCESS) ] = ARCH_PERFMON_EVENTSEL_INT, /* DATA_READ */ /* see note on L1 OP_READ */ [ C(RESULT_MISS) ] = 0x0002, /* DATA_PAGE_WALK */ }, [ C(OP_WRITE) ] = { [ C(RESULT_ACCESS) ] = 0x0001, /* DATA_WRITE */ [ C(RESULT_MISS) ] = 0x0002, /* DATA_PAGE_WALK */ }, [ C(OP_PREFETCH) ] = { [ C(RESULT_ACCESS) ] = 0x0, [ C(RESULT_MISS) ] = 0x0, }, }, [ C(ITLB) ] = { [ C(OP_READ) ] = { [ C(RESULT_ACCESS) ] = 0x000c, /* CODE_READ */ [ C(RESULT_MISS) ] = 0x000d, /* CODE_PAGE_WALK */ }, [ C(OP_WRITE) ] = { [ C(RESULT_ACCESS) ] = -1, [ C(RESULT_MISS) ] = -1, }, [ C(OP_PREFETCH) ] = { [ C(RESULT_ACCESS) ] = -1, [ C(RESULT_MISS) ] = -1, }, }, [ C(BPU ) ] = { [ C(OP_READ) ] = { [ C(RESULT_ACCESS) ] = 0x0012, /* BRANCHES */ [ C(RESULT_MISS) ] = 0x002b, /* BRANCHES_MISPREDICTED */ }, [ C(OP_WRITE) ] = { [ C(RESULT_ACCESS) ] = -1, [ C(RESULT_MISS) ] = -1, }, [ C(OP_PREFETCH) ] = { [ C(RESULT_ACCESS) ] = -1, [ C(RESULT_MISS) ] = -1, }, }, }; static u64 knc_pmu_event_map(int hw_event) { return knc_perfmon_event_map[hw_event]; } static struct event_constraint knc_event_constraints[] = { INTEL_EVENT_CONSTRAINT(0xc3, 0x1), /* HWP_L2HIT */ INTEL_EVENT_CONSTRAINT(0xc4, 0x1), /* HWP_L2MISS */ INTEL_EVENT_CONSTRAINT(0xc8, 0x1), /* L2_READ_HIT_E */ INTEL_EVENT_CONSTRAINT(0xc9, 0x1), /* L2_READ_HIT_M */ INTEL_EVENT_CONSTRAINT(0xca, 0x1), /* L2_READ_HIT_S */ INTEL_EVENT_CONSTRAINT(0xcb, 0x1), /* L2_READ_MISS */ INTEL_EVENT_CONSTRAINT(0xcc, 0x1), /* L2_WRITE_HIT */ INTEL_EVENT_CONSTRAINT(0xce, 0x1), /* L2_STRONGLY_ORDERED_STREAMING_VSTORES_MISS */ INTEL_EVENT_CONSTRAINT(0xcf, 0x1), /* L2_WEAKLY_ORDERED_STREAMING_VSTORE_MISS */ INTEL_EVENT_CONSTRAINT(0xd7, 0x1), /* L2_VICTIM_REQ_WITH_DATA */ INTEL_EVENT_CONSTRAINT(0xe3, 0x1), /* SNP_HITM_BUNIT */ INTEL_EVENT_CONSTRAINT(0xe6, 0x1), /* SNP_HIT_L2 */ INTEL_EVENT_CONSTRAINT(0xe7, 0x1), /* SNP_HITM_L2 */ INTEL_EVENT_CONSTRAINT(0xf1, 0x1), /* L2_DATA_READ_MISS_CACHE_FILL */ INTEL_EVENT_CONSTRAINT(0xf2, 0x1), /* L2_DATA_WRITE_MISS_CACHE_FILL */ INTEL_EVENT_CONSTRAINT(0xf6, 0x1), /* L2_DATA_READ_MISS_MEM_FILL */ INTEL_EVENT_CONSTRAINT(0xf7, 0x1), /* L2_DATA_WRITE_MISS_MEM_FILL */ INTEL_EVENT_CONSTRAINT(0xfc, 0x1), /* L2_DATA_PF2 */ INTEL_EVENT_CONSTRAINT(0xfd, 0x1), /* L2_DATA_PF2_DROP */ INTEL_EVENT_CONSTRAINT(0xfe, 0x1), /* L2_DATA_PF2_MISS */ INTEL_EVENT_CONSTRAINT(0xff, 0x1), /* L2_DATA_HIT_INFLIGHT_PF2 */ EVENT_CONSTRAINT_END }; #define MSR_KNC_IA32_PERF_GLOBAL_STATUS 0x0000002d #define MSR_KNC_IA32_PERF_GLOBAL_OVF_CONTROL 0x0000002e #define MSR_KNC_IA32_PERF_GLOBAL_CTRL 0x0000002f #define KNC_ENABLE_COUNTER0 0x00000001 #define KNC_ENABLE_COUNTER1 0x00000002 static void knc_pmu_disable_all(void) { u64 val; rdmsrl(MSR_KNC_IA32_PERF_GLOBAL_CTRL, val); val &= ~(KNC_ENABLE_COUNTER0|KNC_ENABLE_COUNTER1); wrmsrl(MSR_KNC_IA32_PERF_GLOBAL_CTRL, val); } static void knc_pmu_enable_all(int added) { u64 val; rdmsrl(MSR_KNC_IA32_PERF_GLOBAL_CTRL, val); val |= (KNC_ENABLE_COUNTER0|KNC_ENABLE_COUNTER1); wrmsrl(MSR_KNC_IA32_PERF_GLOBAL_CTRL, val); } static inline void knc_pmu_disable_event(struct perf_event *event) { struct hw_perf_event *hwc = &event->hw; u64 val; val = hwc->config; val &= ~ARCH_PERFMON_EVENTSEL_ENABLE; (void)wrmsrl_safe(hwc->config_base + hwc->idx, val); } static void knc_pmu_enable_event(struct perf_event *event) { struct hw_perf_event *hwc = &event->hw; u64 val; val = hwc->config; val |= ARCH_PERFMON_EVENTSEL_ENABLE; (void)wrmsrl_safe(hwc->config_base + hwc->idx, val); } static inline u64 knc_pmu_get_status(void) { u64 status; rdmsrl(MSR_KNC_IA32_PERF_GLOBAL_STATUS, status); return status; } static inline void knc_pmu_ack_status(u64 ack) { wrmsrl(MSR_KNC_IA32_PERF_GLOBAL_OVF_CONTROL, ack); } static int knc_pmu_handle_irq(struct pt_regs *regs) { struct perf_sample_data data; struct cpu_hw_events *cpuc; int handled = 0; int bit, loops; u64 status; cpuc = this_cpu_ptr(&cpu_hw_events); knc_pmu_disable_all(); status = knc_pmu_get_status(); if (!status) { knc_pmu_enable_all(0); return handled; } loops = 0; again: knc_pmu_ack_status(status); if (++loops > 100) { WARN_ONCE(1, "perf: irq loop stuck!\n"); perf_event_print_debug(); goto done; } inc_irq_stat(apic_perf_irqs); for_each_set_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) { struct perf_event *event = cpuc->events[bit]; handled++; if (!test_bit(bit, cpuc->active_mask)) continue; if (!intel_pmu_save_and_restart(event)) continue; perf_sample_data_init(&data, 0, event->hw.last_period); if (perf_event_overflow(event, &data, regs)) x86_pmu_stop(event, 0); } /* * Repeat if there is more work to be done: */ status = knc_pmu_get_status(); if (status) goto again; done: /* Only restore PMU state when it's active. See x86_pmu_disable(). */ if (cpuc->enabled) knc_pmu_enable_all(0); return handled; } PMU_FORMAT_ATTR(event, "config:0-7" ); PMU_FORMAT_ATTR(umask, "config:8-15" ); PMU_FORMAT_ATTR(edge, "config:18" ); PMU_FORMAT_ATTR(inv, "config:23" ); PMU_FORMAT_ATTR(cmask, "config:24-31" ); static struct attribute *intel_knc_formats_attr[] = { &format_attr_event.attr, &format_attr_umask.attr, &format_attr_edge.attr, &format_attr_inv.attr, &format_attr_cmask.attr, NULL, }; static const struct x86_pmu knc_pmu __initconst = { .name = "knc", .handle_irq = knc_pmu_handle_irq, .disable_all = knc_pmu_disable_all, .enable_all = knc_pmu_enable_all, .enable = knc_pmu_enable_event, .disable = knc_pmu_disable_event, .hw_config = x86_pmu_hw_config, .schedule_events = x86_schedule_events, .eventsel = MSR_KNC_EVNTSEL0, .perfctr = MSR_KNC_PERFCTR0, .event_map = knc_pmu_event_map, .max_events = ARRAY_SIZE(knc_perfmon_event_map), .apic = 1, .max_period = (1ULL << 39) - 1, .version = 0, .cntr_mask64 = 0x3, .cntval_bits = 40, .cntval_mask = (1ULL << 40) - 1, .get_event_constraints = x86_get_event_constraints, .event_constraints = knc_event_constraints, .format_attrs = intel_knc_formats_attr, }; __init int knc_pmu_init(void) { x86_pmu = knc_pmu; memcpy(hw_cache_event_ids, knc_hw_cache_event_ids, sizeof(hw_cache_event_ids)); return 0; }
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1